Major aortopulmonary collateral artery

A MAPCA ( of closely: . Aortopulmonary collateral artery Major aortopulmonary collateral artery or main ) is an aorto - pulmonary collaterals. May have access to prenatal or incurred after cycle changing operations (eg Fontan operation ), let these oxygen-rich due to the higher pressure there blood of the systemic circulation from the aorta or its branches reach the pulmonary circulation.

Because of this collateral circulation is often hemodynamically undesirable MAPCAs are generally sealed by cardiac catheterization procedures with the help of coils.